The only Stephen King book I've ever been able to finish is The Long Walk, which is in the Bachman Books. That story is friggen awesome. I'm more into sci-fi books or fantasy which is why I've never really gotten in to King, but if you haven't read that one, I highly recommend it. I heard the other short stories in that book are pretty good too.
P.S. Kurt Vonnegut rules you should all read one of his books if you never have (completely off topic, but this guy just doesn't get enough respect)